Lochinvar ENTRUS RAH040 Installation And Operation Manual

Residential air-water heat pump mono bloc unit

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100389483_2000843986_Rev A

Residential Air-Water

Heat Pump

Installation and Operation

Manual

Mono Bloc Unit

RAH040

This service information is designed for

⚠

WARNING

experienced repair technicians only and

is not designed for use by the general

public. It does not contain warnings

or cautions to advise non-technical

individuals of potential dangers in

attempting to service a product.

Products

powered

electricity

should be serviced or repaired only by

experienced professional technicians.

Any attempt to service or repair the

products dealt with in this service

information by anyone else could result

in serious injury or death.

Save this manual for future reference.

ACXF60-57420

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Summary of Contents for Lochinvar ENTRUS RAH040

Page 1 100389483_2000843986_Rev A Residential Air-Water Heat Pump Installation and Operation Manual Mono Bloc Unit RAH040 This service information is designed for ⚠ WARNING experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Page 2: Table Of Contents
Contents 7. MAINTENANCE GUIDE 1. SAFETY PRECAUTIONS ......... 3-5 2. PRECAUTION FOR USING R32 REFRIGERANT 6-12 Maintenance Menu ............53 3. FEATURES ..............13 8. TROUBLESHOOTING GUIDE 4. LOCATION OF CONTROLS AND COMPONENTS Refrigeration Cycle System ..........54 Indoor Unit ................ 14 Relationship between the Condition of the Air-to-Water Menu Functions Table ..........17-27 Heatpump Indoor and Outdoor Units and Pressure and...
Page 3: Safety Precautions
Installation and Operation Manual Safety Precautions Read the following “SAFETY PRECAUTIONS” carefully CAUTION indicates the possibility of CAUTION ⚠ before installation of (Mono bloc) Air-to-Water Heatpump causing injury or damage to properties system (hereafter referred to as “Mono bloc unit”). Electrical only.
Page 4 This equipment must be properly connected to the ground. Earth line must not be connected to gas pipe, water pipe,  earth of lightning rod and telephone. Otherwise, it may cause electrical shock in case of equipment breakdown or insulation breakdown. FCC Responsible Party: Lochinvar LLC. 300 Maddox-Simpson Pkwy, Lebanon, TN 37090 (800) 722-2101 lochinvar@lochinvar.com...
Page 5: Federal Communications Commission Interference Statement
Installation and Operation Manual Safety Precautions CAUTION ⚠ Do not install the Mono bloc unit at place where leakage of flammable gas may occur. In case gas leaks and �� accumulates at surrounding of the Mono bloc unit, it may cause fire. Do not release refrigerant during piping work for installation, re-installation and during repairing a refrigeration ��...
Page 6: Precaution For Using R32 Refrigerant
Installation and Operation Manual Precaution for Using R32 Refrigerant The basic installation work procedures are the same as conventional refrigerant (R410A, R22) models. However, pay careful attention to the following points: WARNING ⚠ Since the working pressure is higher than that of refrigerant R22 models, some of the piping and installation and service tools are special.
Page 7: Service Personnel
Installation and Operation Manual Precaution for Using R32 Refrigerant CAUTION ⚠ • Must comply with national gas regulations, state municipal rules and legislation. Notify relevant authorities in accordance with all applicable regulations. • Must ensure mechanical connections be accessible for maintenance purposes. •...
Page 8 Installation and Operation Manual Precaution for Using R32 Refrigerant CAUTION ⚠ No ignition sources • No person carrying out work in relation to a refrigerating system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.
Page 9 Installation and Operation Manual Precaution for Using R32 Refrigerant CAUTION ⚠ • Intrinsically safe components must be replaced. • Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. •...
Page 10 Installation and Operation Manual Precaution for Using R32 Refrigerant CAUTION ⚠ • When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall be used. However, it is important that best practice is followed since flammability is a consideration.
Page 11 Installation and Operation Manual Precaution for Using R32 Refrigerant CAUTION ⚠ • Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details. • It is recommended good practice that all refrigerants are recovered safely. •...
Page 12 Installation and Operation Manual Precaution for Using R32 Refrigerant CAUTION ⚠ • When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely. • When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed.
Page 13: Features
Installation and Operation Manual Features • Inverter Technology -Energy saving • High Efficiency • Compact Design • Environment Protection - Non-ozone depletion substances refrigerant (R32) • Easy to use control panel • Weekly Timer • Quality Improvement - Random auto restart after power failure for safety restart operation - Gas leakage protection - Prevent compressor reverse cycle...
Page 14: Location Of Controls And Components Indoor Unit
Installation and Operation Manual Location of Controls and Components Indoor Unit Remote control buttons and display Figure 4-1 Control buttons Buttons / Indicator Quick Menu button Back button Returns to the previous screen LCD Display Main Menu button For function setup ON/OFF button Starts/Stops operation Operation indicator...
Page 15 Installation and Operation Manual Location of Controls and Components Figure 4-2 Display Display Mode selection AUTO • Depending on the preset outdoor COOL • COOL operation is either turned temperature, the system selects ON or OFF. HEAT or COOL operation •...
Page 16: Quick Menu
Installation and Operation Manual Location of Controls and Components Initialization Before customizing the various menu settings, please initiate the Remote Controller by selecting the desired language of operation and entering the date and time correctly. When power is turned on for the first time, it will show the Settings Screen automatically. It can also be set from Personal Settings of the menu.
Page 17 Installation and Operation Manual Location of Controls and Components Menus for User Figure 4-5 Navigation Select menus and determine settings according to the system available in the household. All initial settings must be done by a qualified installer or service technician. It is recommended that all alterations of the initial settings are also done by an authorised dealer or a specialist.
Page 18: Menu Functions Table
Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function • To set the auto sterilization ON or OFF. • Available only if connected to the tank. • Do not use the system during sterilization in order to prevent scalding with hot water, or overheating of shower.
Page 19 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function Touch sound • Adjust the level of operation sound. LCD contrast • Sets the screen contrast. Backlight • Sets the duration of screen backlight. 1 min Backlight •...
Page 20 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function Service Contact 1 / • Preset contact number for installer Contact 2 Heater • To reduce the heater power if 6 kW capacity unnecessary.
Page 21 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function • Type A - The base pan heater activates only during de-ice operation. Base pan • Type B -The base pan heater activates heater when outdoor ambient temperature is 41°F or lower.
Page 22 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function Operation • To access to the four major functions or Heat / Cool/ Auto / Tank Setup modes. Heat Water temp. for heating •...
Page 23 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function Heat Temperature for heating • To set various water & ambient Outdoor temp. for temperatures for heating. heating OFF 75°F ΔT for heating ON 9°F Set ΔT for heating ON.
Page 24 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function Cool Water temperatures for • To set various water & ambient cooling ON and ΔT for temperatures for cooling. cooling ON. Water temp.
Page 25 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function Auto Outdoor temperatures • Automatic switch from Heat to Cool or for switching from Heat Cool to Heat. to Cool or Cool to Heat. Outdoor temp.
Page 26 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function Tank Sterilization: Time • Automatic switch from Heat to Cool or 12:00 Cool to Heat. Time of the selected day(s) of the week to sterilize the tank 0:00 ~ 23:59 Sterilization: Boiling...
Page 27 Installation and Operation Manual Location of Controls and Components Table 4-1 Menu Functions continued Menu Description Default Setting Display Function Service Service engineer’s name contact • To set up to 2 contact names and and contact number. numbers for the User. Contact 1 / Contact 2 Contact 1 / Contact 2 Contact name or...
Page 28: Diagrams
Installation and Operation Manual Diagrams Figure 5-1 Optional Piping System...
Page 29: Installation
Installation and Operation Manual Installation Handling of the Mono bloc unit Figure 6-1 Grip anchor vs Embedded anchor The Mono bloc unit is a large and heavy unit. The handling of Grip anchor bolt the unit is only to be done by lifting tools with slings. These Anchor bolt 2-3/8”...
Page 30: Specification
Installation and Operation Manual Installation Table 6-2 Field Supplied Accessories (Optional) Part Specification two-way valve 20 - 30VAC, 0.5A three-way valve 20 - 30VAC, 0.5A Room thermostat 20 - 30VAC, 2VA (0.15A) Extra pump 110-130VAC, 0.54A Figure 6-3 Minimum distance for installation Water Outlet Pipe Water Inlet Pipe...
Page 31: Piping Installation
Installation and Operation Manual Installation Piping installation Figure 6-4 Unit drainage in case of power outage This section is for authorized and licensed ⚠WARNING electrician / water system installers only. Work behind the cabinet front plate secured by screws must only be carried out under supervision of qualified installer or service technician.
Page 32 Installation and Operation Manual Installation This section is for authorised and licensed Figure 6-7 Unit terminal ⚠WARNING electricians only. Work behind the cabinet front plate secured by screws must only be Terminal on the Mono bloc unit carried out under supervision of qualified (Power Supply Cord) installer or service technician.
Page 33 Installation and Operation Manual Installation Connection requirement for RAH040 Figure 6-9 Cable and cord connections All connections shall follow the local national wiring standard. It is strongly recommended to use manufacturer-recommended parts and accessories for installation. For connection to main PCB: Two-way valve connection is 20-30VAC, with a 0.5A maximum.
Page 34 Installation and Operation Insert the Manual driver and slightly turn. Installation Flat-blade screwdriver Remote controller wiring Figure 6-12 Mounting instructions - exposed For exposed type Remote controller connection is 16VDC, with a 25mA maximum. Wires shall be a minimum 22AWG, of double insulation PVC-sheathed or rubber sheathed cable.
Page 35 Installation and Operation Manual Installation Charging the water Check Water Pressure Make sure all the piping installations are properly done before Water pressure should not be lower than 7 Psi (with inspects carrying out the following steps: the Water Pressure Gauge). If necessary add tap water into the water circuit.
Page 36 Installation and Operation Manual Installation Be careful not to touch parts other than ⚠WARNING Figure 6-16 Air purge valve RCCB test button when the power is supplied to Mono bloc unit. Touching the Mono bloc unit while powered could result in electrical shock.
Page 37: Maintenance
Installation and Operation Manual Installation If the pump is left running dry for a long Maintenance NOTICE period of time, it may cause the pump to In order to ensure optimal performance of the unit, seasonal malfunction. inspections on the unit, functional check of RCCB, field wiring, Once all the air has been removed from the water circulation and piping have to be carried out at regular intervals.
Page 38 Installation and Operation Manual Installation Room Thermostat Connect floor heating or radiator directly to the Mono bloc. Install the remote controller in the room where floor heating is installed. This is an application that uses remote controller as Room Thermostat. Mono bloc receive Room Thermistor temperature from Mono bloc Remote controller to control HP and circulation pump.
Page 39: Buffer Tank Connection
Mono bloc does NOT exceed 131°F. Boiler is turned off by safety control when the water temperature of the heating circuit exceed 185°F. Lochinvar is NOT responsible for incorrect or unsafe installations of the boiler system. ⚠WARNING...
Page 40 Installation and Operation Manual Installation Fixing external devices Figure 6-21 Main PCB connections Length of Connecting Cables When connecting cables between Mono bloc and external OLP for booster heater devices, the length of the said cables must not exceed the Bu er tank sensor maximum length as shown in the following table.
Page 41 Installation and Operation Manual Installation Remote control outline Figure 6-22 Remote Controller DIAGRAM NAME FUNCTION Main screen Display information Menu Open/Close main menu Triangle (Move) Select or change item Operate Start/Stop operation Back Back to previous item Quick Menu Open/Close Quick menu Confirm...
Page 42 Installation and Operation Manual Installation Figure 6-23 Remote controller home screen Name Function 1: Function icon Display set function/status Holiday mode Room Weekly timer heater Quiet mode Tank heater Remote controller room thermostat Powerful mode Backup boiler 2: Mode Display set mode/current status of mode Heating Cooling Auto...
Page 43: System Setup
Installation and Operation Manual Installation System setup Figure 6-25 Remote controller flow chart System setup Zone & Sensor Sensor Select: Water Temperature/ Room Thermostat Heater capacity Capacity select Anti freezing Yes/No Tank connection Yes/No DHW Capacity Variable/Standard Bu er Tank connection Yes/No T setup Tank heater...
Page 44: Operation Setup
Installation and Operation Manual Installation Operation setup Figure 6-25 Remote controller flow chart continued Operation setup Heat Water temp. for heating ON Compensation curve Compensation curve setup Direct Direct temp. setup Outdoor temp. for heating OFF Heating OFF Temp. setup T for heating ON T for heating setup Heater ON/OFF...
Page 45 Installation and Operation Manual Installation System setup Figure 6-26 Remote controller settings System setup 12:00am,Mon 1. Zone & Sensor Initial setting: Water temp. Zone & Sensor Heater capacity Select sensor of room temperature control from the following 2 items Anti freezing 1 Water temperature (Circulation water temperature) Tank Connection 2 Room thermostat (Internal or External)
Page 46 Installation and Operation Manual Installation Figure 6-26 Remote controller settings continued System setup 12:00am,Mon 5. DHW Capacity Initial setting: Variable Heater capacity Variable DHW capacity setting normally run with efﬁ cient heating which is energy saving Anti freezing heating. But while hot water usage high and tank water temperature low, variable DHW mode will run with fast heat up which heat up the tank with high heating capacity.
Page 47 Installation and Operation Manual Installation Figure 6-26 Remote controller settings continued System setup 12:00am,Mon 10. BackupBoiler connection Initial setting: No Tank heater Set if heat pump linked with boiler operation. Base pan heater Connect the start signal of the boiler in boiler contact terminal (main PCB). Alternative outdoor sensor Set Backup Boiler connection to YES.
Page 48 Installation and Operation Manual Installation Figure 6-26 Remote controller settings continued 12:00am,Mon System setup 11. Circulation Liquid Initial setting: Water Base pan heater Set circulation of heating water. Alternate outdoor sensor Backup Boiler There are 2 types of settings, water and glycol mixture. Circulation liquid (NOTE) Please set glycol when using anti-freeze liquid.
Page 49 Installation and Operation Manual Installation Figure 6-26 Remote controller settings continued 17. Water temp. for heating ON Initial setting: compensation curve 131°F Decide temperature of 4 points as shown Set target water temperature to operate heating operation. Hot water temperature in diagram Compensation curve: Target water temperature change in conjunction with outdoor ambient temperature change.
Page 50 Installation and Operation Manual Installation Figure 6-26 Remote controller settings continued 68°F 21. Water temp. for cooling ON Initial setting: Compensation curve Set target water temperature to operate cooling operation. Compensation curve: Target water temperature change in conjunction with outdoor ambient 41°F temperature change.
Page 51 Installation and Operation Manual Installation Figure 6-26 Remote controller settings continued 12:00am,Mon Service setup 29. Pump maximum speed Flow rate Max. Duty Operation Normally setting is not necessary. Please adjust when need to reduce the pump sound etc. Air Purge 0.00 gal/min 0x00 Besides that, it has Air Purge function.
Page 52: Maintenance Guide
Installation and Operation Manual Maintenance Guide RCCB In order to ensure safety and optimal performance of the unit, seasonal inspections on the unit, functional check of RCCB/ Ensure the RCCB is set to “ON” before checking the RCCB. ELCB, field wiring and piping have to be carried out at regular Turn on the power supply to the Mono bloc unit.
Page 53: Maintenance Menu
Installation and Operation Manual Maintenance Guide Custom Menu Reset overload protector Overload Protector a serves the safety purpose to prevent the Setting method of Custom menu water over heating. When the Overload Protector trip at high Custom menu 12:00am,Mon water temperature, take below steps to reset it. Cool mode a.
Page 54: Troubleshooting Guide Refrigeration Cycle System
Installation and Operation Manual Troubleshooting Guide Refrigeration Cycle System Standard Pressure Table 8-1 In order to diagnose malfunctions, make sure that there are no Gas pressure PSI electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with Heating Mode 333.6 ~ 420.6 the power source, or malfunction of a compressor and a fan.
Page 55: Electric Current
Installation and Operation Manual Troubleshooting Guide Relationship between the Condition of the Air-to-Water Heatpump Indoor and Outdoor Units, Table 8-2 Pressure, and Electric Current Heating Mode Cooling Mode Condition of the Air-to-Water Heat Electric Electric pump indoor and Low Pressure High Pressure current during Low Pressure...
Page 56 Installation and Operation Manual Troubleshooting Guide Locate error code Figure 8-2 Error number Blinking Display past/ last error code Figure 8-3...
Page 57: Error Codes Table
Installation and Operation Manual Troubleshooting Guide Error chart Table 8-3 Diagnosis Abnormality/Protection Abnormality Primary location to verify display control judgement No abnormality detected • Indoor/outdoor connection wire Indoor/Outdoor capacity 90s after power • Indoor/outdoor PCB unmatched supply • Specification and combination table in catalogue Outdoor compressor •...
Page 58 Installation and Operation Manual Troubleshooting Guide Error chart continued Table 8-3 Diagnosis Abnormality/Protection Abnormality Primary location to verify display control judgement Back-up heater OLP • Back-up heater OLP (Disconnection or Continue for 60 sec. abnormality activated) Tank sensor abnormal Continue for 5 sec. •...
Page 59 Installation and Operation Manual Troubleshooting Guide Error chart continued Table 8-3 Diagnosis Abnormality/Protection Abnormality Primary location to verify display control judgement IPM (power transistor) 3 times occurrence • Improper heat exchange overheating protection within 30 minutes • IPM (Power transistor) Outdoor Direct Current (DC) 7 times occurrence •...
Page 60: Revision Notes
Revision Notes: Revision A (PCP #3000065189 / CN #500051006) initial release. 100389483_2000843986_Rev A 01/25...

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